Nozzle puller



Aug. 2, 19 c. M. h lEwMAN 2,947,074

NOZZLE FULLER Filed Feb. 11, 1957 2 Sheets-Sheet, 1

| \[TWH C/arence M Newman INVENTOR.

A TMAWE) Aug. 2, 1960 c. M. NEWMAN NOZZLE FULLER 2 Sheets-Sheet 2 Filed Feb. 11, 1.957

C/are/vcle M A ewmo/z INVENTOR.

BY KM A TTO/Q/VE Y United rates Patent This invention relates to a tool for removing a sleeve type member or bushing from position within a mounting 2,947,074 Patented Aug. 2, 1960 See counterbore or socket 2 having an annular groove 3 there'- in. Positioned within the groove 3 is an O-ring which makes sealing engagement with the periphery of a nozzle 4 so that leakage of fluid past the nozzle is prevented. A snap ring fits within the groove 6 and overlies the end of the nozzle to hold it in place.

In order to have a structure which erosion and yet provides a fluid stream of high velocity at the exit ofthe nozzle, the interior of the nozzle is so contoured that its entrance 8 conforms in cross section with the passage 9 in' the boss 1. Thence, it converges to the opening or orifice 10' of a considerably reduced diameter. If the nozzle 4 is to be removed the snap ring is first removed from'the groove 6 and then suflicient force is therefor. The tool is of particular utility in removing wear resistant nozzles from their mounting sockets in mechanisms such as earth boring drills, sand blasting nozzle assemblies and the like.

The invention in its preferred form and the mode of operation thereof will be described in connection with the applied axially of the nozzle to effect its withdrawal from within the counterbore 2. To effect this force the invention provides a tool generally indicated at 11. This tool comprises a composite handle 12, made up of members 13, 14, attached to the stem 15 which extends downwardly therefrom. The stem 15 is likewise composite I and comprises members 16, 17 of which the latter is ser'emovalot wear resistant nozzles used in earth boring drills although it is to be understood that utility of the invention is not confined to this specific field.

An object of the invention is to provide a simple and practical tool which is capable of easily and quickly removing nozzles from earth boring drills, even in the field,

so that replacement of nozzles may be quickly effected.

A more specific object is to provide a tool having elements movable to a relative position that will permit introduction to the interior of the sleeve or nozzle to be removed and thereafter movable to a relative position that will effect engagement with-the sleeveor'nozzle so that manually or mechanically applied force will withdraw the sleeve or nozzle from within its mounting.

The foregoing objects together with other objects and advantages will be more fully apparent fromthe following description and the accompanying drawings, in which:

Fig. l is a side elevational view of an embodiment of the invention, parts being shown in their relative positions as the tool is being inserted into a nozzle to be pulled thereby;

Fig. 2 issimilar to Fig. 1 but shows parts in their relative positions as the tool is being used to withdraw a nozzle from the socket within which it was previously mounted;

Figs. 3 and 4 are sectional views taken on lines 3--3 and 4-4, respectively in Fig. 2;

Fig. 5 is an elevational view of a modified form in which force is mechanically applied to eflect withdrawal of the nozzle from within its socket;

Fig. 6 is an extended view showing the cooperating parts which mechanically exert necessary force for withdrawing the nozzle from its socket.

Earth boring drills are conventionally provided with passages for conducting abrasive laden fluids and directing such fluids in a predetermined direction to elfect desired cleaning action on the cutters and upon the bottom of the hole being drilled. Relatively large volumes of such fluids are pumped with the result that there is destructive abrasion of the passages. It has long been the practice to secure abrasion resistant sleeves or nozzles in the passages. More recently it has become the practice of making the nozzles replaceable so that an abraded nozzle may be readily replaced or one may replace all of the nozzles of a drill with a set of nozzles of a different orifice opening.

A common construction is shown in the drawings wherein a boss 1 on the bit head is provided with a cured to handle member 1 4' as by screws 18 whilethe former passes slidably through the handle meinber 14 and is secured in a suitable manner to the handle member13.

Member 14 is counterbored at20 to receive the c ompression spring 21 which normally retains the handle members in spaced relation as shown in Fig. l. The limit of movement of the handle members 13, 14 and the at tached stem members is determined by a projection 22 on the stem member 16. V

Members 16,17 pass through afferrule 23 secured to one of the members as by a screw 24 whereby the members are held in alignment but are permitted to move slidably and nonrotatively longitudinally relative to each other. The lower end of each of these members is, reduced in cross section at 25 and has a sidewardly extending projection 26. The transverse dimension of the projection 26 and the reduced portion 25 of the adjacent member 17 are less than the diameter of the opening or orifice 10 in the nozzle 4. Hence, the lower end of the tool may enter the nozzle as shown in Fig. 1.

The snap ring having been removed from the groove 6 in the boss 1, and the tool in the position shown in Fig. 1, the handle 12 is compressed until all parts of the tool are in the relative positions shown in Fig. 2, wherein it is readily seen that the overall transverse dimensions of the two projections 26, in sideby-side relation, is greater than the opening 10 in the nozzle 4. Hence, a pull may be exerted upon the tool and the nozzle is withdrawn from within the counterbore 2to attain the primary object of the invention.

- Frequently when a drill is used fine materials enter the minute annulus between the nozzle 4 and the inner wall of the counterbore 2 whereby the nozzle is held rigidly in place and force applied manually is insufficient to withdraw the nozzle from position within the counterbore. For such conditions the tool includes a sleeve 30 having its lower end of a size to engage the end of the boss 1 about the counterbore 2 and also having an internal diameter sufliciently large to permit entry of the nozzle 4 into the sleeve.

The upper end of sleeve 30 is surmounted by a collar 31 having a series of openings 32 in its periphery to receive the end of a lever 33 (Fig. 5). This collar has a reduced portion 34 to fit rotatably within the upper end of the sleeve 30 and is also internally threaded to receive complementary threads on hollow jack screw 35, provided at its upper end with one or more slots 36.

Mounted upon'the jack screw 35 is a V-shaped clamp 40 having its lower limb bifurcated at 41 to fit about the stem 15. This clamp also has a downward projection 42 to enter the slot 36 in the end of the screw jack 35. It is to be noted that the internal span of the clamp 40 is sufficient to encompass the handle 12 when in contracted condition as shown in Figs. 2 and- 5 and ispositioned about the handle after the projections 26 are brought into opposed relation as-shown in these figures.

When using the tool when assembled as just described the lever 33 is used to rotate the collar 31 and lift the jack screw 35. This produces liftingw action. upon the clamp 40, and handle 12 to lift the nozzle 4 from within the counterbore 2. r

While the invention is specifically described in conneotion with the removal of nozzles, it is obvious that it is utilitarian in removing sleeves, bearings and the like whenever it may be inserted. and actuated to present an enlarged portion to engage and exert a pullingforce upon the member to be pulled.

Broadly the invention comprehends a new and improved tool for withdrawing a sleeve type member from within a mounting therefor.

The invention claimed is:

1. A tool for removing a bushing from within its mounting comprising, a stem consisting of a pair of elongatedmembers in side-by-side relation and mounted to move longitudinally relative to each other, a handle member attached to one of said stern members, said handle member having a counterbore opening therein through which the other of said elongated members passes, a second handle member attached to the other of said stem members, "a compression spring in said counterbore and normally urging said handle members and the attached stem members to predetermined extended positions, and a sidewardly extending projection on the other end of each of said stem members, said projections being in spaced relation when the handle members are in extended position but movable to opposed relation when the handle members are moved to juxtaposed position to form -a composite handle.

2. A tool for removing a bushing from within its mounting comprising, a stem consisting of a pair of elongated members mounted to move slidably and nonrotatively longitudinally relative to each other, a handle member attached to one of said stern members and having a transverse opening therein through which the other of said members passes, a second handle member attached to the other of said stem members, a sidewardly extending projection on the other end of each of the stem members, said projections being of a transverse dimension to pass through the bushing when in longitudinally displaced positions but to engage the bushing when in opposed relation, and said handle members being movable to juxtaposed position to move the projections into opposed relation andz'to form a composite handle to exert a pulling force upon the bushing.

3. A tool for removing a bushing from within its mounting comprising, a stem consisting of a pair of elongated members mounted to move slidably and nonrotatively longitudinally relative to each other, a pair of handle members attached, respectively, to one end of said stem members, one of said stem members. passing slidably through one of the handle members whereby the handle members are in opposed relation, means normally urging the handle members to a predetermined spaced relation, and sidewardly extending projections on the other end of said stem members in opposed relation when the handle members are moved to juxtaposed position to form a composite handle. 1

References Qiteti'in the tile of this patent UNITED STATES PATENTS 1,465,124 Gardner Aug. 14, 1923 1,504,650 Smith Aug. 12, 1924 1,521,381 McPherson Dec. 30, 1924 1,544,246 Leslie June 30, 1925 1,576,389 Wilkins Mar. 9, 1926 2,136,875 Blane Nov. 15, 1938 2,160,652 Feigh May 30, 1939 2,794,667 Bissitt June 4, 1957 2,796,282 Peterson June 18, 1957 

